Added promotions to redux and added selector for setting promotions if not PRO

• Added:
- promotions to redux
- selector for setting promotions if not PRO

• Updated:
- StatusList, SidebarPanelGroup to use promotions from redux

app/controllers/api/v1/promotions_controller.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class Api::V1::PromotionsController < EmptyController
+
+  def index
+    data = ActiveModelSerializers::SerializableResource.new(Promotion.active, each_serializer: REST::PromotionSerializer)
+    render json: data.to_json, content_type: 'application/json'
+  end
+
+end